Brittle-ductile transition stress of different rock types and its relationship with uniaxial compressive strength and Hoek-Brown material constant (m).

Rocks deformed at low confining pressure are brittle, which means that after peak stress, the strength declines to a residual value established by sliding friction. The stress drop is the variation between peak and residual values. But no tension reduction takes place at high confining pressure.

Comparative study of topical 80% trichloroacetic acid with 35% trichloroacetic acid in the treatment of the common wart.

Background: Common warts caused by the human papillomavirus (HPV) are considered to be the most common infectious skin disease. No individual treatment for common warts is effective as monotherapy in eradicating the lesions. The aim of this study is to evaluate the clinical efficacy of a 35% and an 80% trichloroacetic acid (TCA) solution in the treatment of the common wart.